The source star of the lensing event KMT-2018-BLG-1743 is located toward the Galactic bulge
field. The equatorial and galactic coordinates of the source are
\(({\rm RA}, {\rm decl.})_{\rm J2000}=(18:17:08.01, -26:21:34.70)\)  and
\((l, b) = (5^\circ \hspace{-2.0pt}.694, -4^\circ \hspace{-2.0pt}.792)\) , respectively. The baseline magnitude
of the source before the lensing magnification was \(I_{\rm base}=19.81\)  according to the KMTNet
scale. We note that the source lies at a very dense field, toward which stellar images are, in
most cases, heavily blended, and thus there exists, in general, little information about the stars
of the field in public databases such as SIMBAD.http://simbad.u-strasbg.fr/simbad/ The
magnification of the source flux induced by lensing was found from the post-season investigation
of the 2018 season KMTNet data using the AlertFinder System [1]}.
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